Brake for spring-motors.



Patentea Apr. 9, mm.

B. G. ROYAL.

BRAKE FDR SPRING MOTURS.

(Applcatian led Hay 1B, 1899.)

I ,liimff UNITED STATES i PATENT OFFICE.

BELFORD G. ROYAL, OF LONDON, ENGLAND, ASSIGNOR TO THOMAS S.

i PARVIN, OF PHILADELPHIA, PENNSYLVANIA.

BRAK FOR SPRING-MOTORS.

SPECIFICATION forming part of Letters Patent No. 671,528, dated April 9, 1901.

Application filed May 16, 1899. Serial No. 717.018. (No model.)

To all whom it may concern:

Be it known that I, BELFORD G. ROYAL, a citizen of the United States, and a resident of London, England, have invented certain new and useful Improvements in Brakes for Spring-Motors,of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specilication.

This invention relates to certain improvements in brakes, and more particularly to a brake adapted for use on gramophones or other sound recording and reproducing machinos.

The object of my invention is to provide a simple and eective device of this character adapted to yieldingly bear against the turntable or other record-support of a talking-machine, so as to adapt itself in the braking operation to any untrueness orunevenness which may occur in the construction of such supports; also,in providing a simplified and effective mechanism for actuating the said device, so that it will brake against the turn-table or other revolving part and effectively stop the same.

To this end my invention consists in the construction herein described,and specifically pointed out in the claims.

In the accompanying drawings, which form a part of this specification, Figure lis a plan view illustrating a portion of a gramophone .and showing my improved brake as applied to the periphery of the record-supporting table. Fig. 2 is a detail sectional view of the brake mechanism, the brake-bolt being shown as bearing against the record-supporting table. Fig. 3 is a similar view showing the position of the parts when the brake-bolt is out of contact with the record-supporting table. Fig. 4 is a cross-sectional view taken onthe line 4 4 of Fig. l. y

In carrying out my invention I provide a hollow cylindrical sleeve A, open at its front end, as at a, and closed at its rear end, as at b. Formed integral with the lower side of the said sleeve A is a base comprising two transversely-extending lugs or footpieces c c', having apertures passing therethrough, by means 5o of which the device may be screwed or bolted to the casing of the machine.

The cylindrical sleeve A is provided with a slot or opening B, located a little forward of the center of the sleeve A and arranged substant-ially transversely lo the longitudinal axis of the said sleeve, the two walls of the said slot being inclined, as illustrated in Fig. l of the drawings. Y C designates the cylindrical brake bolt adapted to t snugly in the interior of the cylindrical sleeve B, and interposed between the inner end of this bolt and the rear wall 19 of the sleeveAis a coiled spring d. The lever E, secured at one end to the bolt C, passes through the slot B and projects" radially from the bolt C, as illustrated in Figs. l and 4 of the drawings.

The operation of my brake may be described as follows: The normal position of the brake mechanism is illustrated in Figs. l and 3 of the drawings. The outer end of the brakebolt C is provided with a friction-block e, of leather or other suitable material, adapted to bear against the periphery of the turn-table G or other record-supporting device, as of a talking-machine,with ayielding pressure, the coiled spring CZ, located at the end of the said bolt, permitting the said bolt to-yield slightly in a direction away from the record-support G to compensate for any irregularities in the mounting of the turn-table, the said spring d also serving to normally force the bolt in a forward direction, so that the lever E will normally be in contact with the forward wallf of the slot B. When it is desired to stop the revolvingwrecord-support G, the lever E is shifted or turned tothe position represented in dotted lines in Fig. 4 of the drawings,which operation throws the bolt forward and into Contact with the periphery of the turn-table by reason of the slot B being inclined, as before described, the torsion of the springdex-` IOO The coiled spring CZ serves to normally hold the lever E against the forward wall of the slot B, and the inclination of the said front wall regulates the longitudinal movement of the bolt C, as Will be readily understood.

While I have shown and described my improved brake as being applied to the periphery of a talking-machine turn-table, it is evident that the same might be applied with equally good results to the under side of the turn-table Without changing either the construction or principle of my invention. In this case the brake Would be securedto the side Walls of the machine-casing.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a brake for gramophones, the combination of a` revoluble part, a cylindrical barrel or casing, A, closed at one of its ends, a plunger, C, adapted to'said casing, a coiled spring, d, interposed between the end of the plunger and the closed end of the casing for keeping the plunger yieldingly in contact with the revoluble part When engaged, the casing having transversely-arranged oblique Walls formed by an inclined slot B, and an operating-lever, E, secured at one end in the plunger, C, adapted to normally bear against the inclined Wall, f, substantially as described and for the purpose stated.

2. A brake for gramophones, comprising in combination with a revoluble part, a vcylindrical barrel or casing, A, closed at one end, footpieces, c, c', formed on the lower sides of said casing having apertures provided therein, a plunger, C, adapted to s aid barrel or casing, A, a friction-block secured on the outer end of said plunger, the casi-ng having transversely-arranged oblique Walls formed in the casing, A, by an obliquely-arranged slot', B, an operating-lever, E, secured at one end to the plunger adapted to normally bear against the oblique Wall,f, and a spring, d, interposed between the inner end of the plunger, C, and the closed end of the casing, A, for keeping the block on the end of the plunger yieldingly in contact with the revoluble part when the brake is engaged substantially as described.

In Witness whereof I have hereunto set my hand this 10th day of March, A. D. 1899.

BELFORD G. ROYAL.

Witnesses:

BENJ. F. PERKINS, HOMER PETTIs. 

